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/*-
* Copyright (c) 2003 Silicon Graphics International Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend.c#4 $
*/
/*
* CAM Target Layer front end interface code
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/endian.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_da.h>
#include <cam/ctl/ctl_io.h>
#include <cam/ctl/ctl.h>
#include <cam/ctl/ctl_frontend.h>
#include <cam/ctl/ctl_frontend_internal.h>
#include <cam/ctl/ctl_backend.h>
/* XXX KDM move defines from ctl_ioctl.h to somewhere else */
#include <cam/ctl/ctl_ioctl.h>
#include <cam/ctl/ctl_ha.h>
#include <cam/ctl/ctl_private.h>
#include <cam/ctl/ctl_debug.h>
extern struct ctl_softc *control_softc;
int
ctl_frontend_register(struct ctl_frontend *fe)
{
struct ctl_frontend *fe_tmp;
KASSERT(control_softc != NULL, ("CTL is not initialized"));
/*
* Sanity check, make sure this isn't a duplicate registration.
*/
mtx_lock(&control_softc->ctl_lock);
STAILQ_FOREACH(fe_tmp, &control_softc->fe_list, links) {
if (strcmp(fe_tmp->name, fe->name) == 0) {
mtx_unlock(&control_softc->ctl_lock);
return (-1);
}
}
mtx_unlock(&control_softc->ctl_lock);
STAILQ_INIT(&fe->port_list);
/*
* Call the frontend's initialization routine.
*/
if (fe->init != NULL)
fe->init();
mtx_lock(&control_softc->ctl_lock);
control_softc->num_frontends++;
STAILQ_INSERT_TAIL(&control_softc->fe_list, fe, links);
mtx_unlock(&control_softc->ctl_lock);
return (0);
}
int
ctl_frontend_deregister(struct ctl_frontend *fe)
{
if (!STAILQ_EMPTY(&fe->port_list))
return (-1);
mtx_lock(&control_softc->ctl_lock);
STAILQ_REMOVE(&control_softc->fe_list, fe, ctl_frontend, links);
control_softc->num_frontends--;
mtx_unlock(&control_softc->ctl_lock);
/*
* Call the frontend's shutdown routine.
*/
if (fe->shutdown != NULL)
fe->shutdown();
return (0);
}
struct ctl_frontend *
ctl_frontend_find(char *frontend_name)
{
struct ctl_softc *ctl_softc = control_softc;
struct ctl_frontend *fe;
mtx_lock(&ctl_softc->ctl_lock);
STAILQ_FOREACH(fe, &ctl_softc->fe_list, links) {
if (strcmp(fe->name, frontend_name) == 0) {
mtx_unlock(&ctl_softc->ctl_lock);
return (fe);
}
}
mtx_unlock(&ctl_softc->ctl_lock);
return (NULL);
}
int
ctl_port_register(struct ctl_port *port, int master_shelf)
{
struct ctl_io_pool *pool;
int port_num;
int retval;
retval = 0;
KASSERT(control_softc != NULL, ("CTL is not initialized"));
mtx_lock(&control_softc->ctl_lock);
port_num = ctl_ffz(&control_softc->ctl_port_mask, CTL_MAX_PORTS);
if ((port_num == -1)
|| (ctl_set_mask(&control_softc->ctl_port_mask, port_num) == -1)) {
port->targ_port = -1;
mtx_unlock(&control_softc->ctl_lock);
return (1);
}
control_softc->num_ports++;
mtx_unlock(&control_softc->ctl_lock);
/*
* We add 20 to whatever the caller requests, so he doesn't get
* burned by queueing things back to the pending sense queue. In
* theory, there should probably only be one outstanding item, at
* most, on the pending sense queue for a LUN. We'll clear the
* pending sense queue on the next command, whether or not it is
* a REQUEST SENSE.
*/
retval = ctl_pool_create(control_softc, CTL_POOL_FETD,
port->num_requested_ctl_io + 20, &pool);
if (retval != 0) {
port->targ_port = -1;
mtx_lock(&control_softc->ctl_lock);
ctl_clear_mask(&control_softc->ctl_port_mask, port_num);
mtx_unlock(&control_softc->ctl_lock);
return (retval);
}
port->ctl_pool_ref = pool;
if (port->options.stqh_first == NULL)
STAILQ_INIT(&port->options);
mtx_lock(&control_softc->ctl_lock);
port->targ_port = port_num + (master_shelf != 0 ? 0 : CTL_MAX_PORTS);
port->max_initiators = CTL_MAX_INIT_PER_PORT;
STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links);
STAILQ_INSERT_TAIL(&control_softc->port_list, port, links);
control_softc->ctl_ports[port_num] = port;
mtx_unlock(&control_softc->ctl_lock);
return (retval);
}
int
ctl_port_deregister(struct ctl_port *port)
{
struct ctl_io_pool *pool;
int port_num;
int retval;
retval = 0;
pool = (struct ctl_io_pool *)port->ctl_pool_ref;
if (port->targ_port == -1) {
retval = 1;
goto bailout;
}
mtx_lock(&control_softc->ctl_lock);
STAILQ_REMOVE(&control_softc->port_list, port, ctl_port, links);
STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links);
control_softc->num_ports--;
port_num = (port->targ_port < CTL_MAX_PORTS) ? port->targ_port :
port->targ_port - CTL_MAX_PORTS;
ctl_clear_mask(&control_softc->ctl_port_mask, port_num);
control_softc->ctl_ports[port_num] = NULL;
mtx_unlock(&control_softc->ctl_lock);
ctl_pool_free(pool);
ctl_free_opts(&port->options);
bailout:
return (retval);
}
void
ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn,
int wwpn_valid, uint64_t wwpn)
{
if (wwnn_valid)
port->wwnn = wwnn;
if (wwpn_valid)
port->wwpn = wwpn;
}
void
ctl_port_online(struct ctl_port *port)
{
port->port_online(port->onoff_arg);
/* XXX KDM need a lock here? */
port->status |= CTL_PORT_STATUS_ONLINE;
}
void
ctl_port_offline(struct ctl_port *port)
{
port->port_offline(port->onoff_arg);
/* XXX KDM need a lock here? */
port->status &= ~CTL_PORT_STATUS_ONLINE;
}
/*
* vim: ts=8
*/
|
